The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2005
Filed:
Oct. 04, 2000
Applicants:
Akio Nakashima, Nagoya, JP;
Takao Kani, Nagoya, JP;
Inventors:
Akio Nakashima, Nagoya, JP;
Takao Kani, Nagoya, JP;
Assignee:
The Pilot Ink Co., Ltd., Aichi-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B43L001/00 ; G09B011/10 ;
U.S. Cl.
CPC ...
Abstract
A water-metachromatic sheet has a support with a porous layer containing a binder resin with dispersed fine-particle silicic acid. The sheet is capable of rendering different transparency between water absorbed and unabsorbed states. The support is a cloth having a weight per unit area of 30 gmto 1,000 gm, the fine-particle silicic acid is contained in an amount of from 1 gmto 30 gm, and the fine-particle silicic acid is incorporated in an amount from 0.5 to 2 parts by weight based on 1 part by weight of the binder resin.